If you're having difficulty playing a disc that you have rented or borrowed, try a disc that you own to see if it plays. If it does play then there could be a problem with the borrowed or rented disc. Try cleaning the disc with a soft cloth to remove any fingerprints or smudges.

Is there a remote control code available that will enable me to use another manufacturer's remote to operate this device?

You will have to contact the remote's manufacturer for the codes needed.

What do I do in the unit has no power?

If the unit is not powering on, remove the power cord plug from any power strip it may be connected to and plug directly into the wall outlet.

Can I playback a DVD from another region other than Region "1", "0", or "play in all regions"?